[1]Bogodist,Yu.I.;Protsenko,D.L.[Sovietprogressinchemistry,1970,vol.36,#11,p.50-52][UkrainskiiKhimicheskiiZhurnal(RussianEdition),1970,vol.36,#11,p.1142-1145]
[1]Volovenko,Yu.M.;Babichev,F.S.;Fursii,T.A.;Litvinenko,S.V.[ChemistryofHeterocyclicCompounds,1991,vol.27,#6,p.674][KhimiyaGeterotsiklicheskikhSoedinenii,1991,vol.27,#6,p.852-853]
[1]Volovenko,Yu.M.;Babichev,F.S.;Fursii,T.A.;Litvinenko,S.V.[ChemistryofHeterocyclicCompounds,1991,vol.27,#6,p.674][KhimiyaGeterotsiklicheskikhSoedinenii,1991,vol.27,#6,p.852-853]
[1]Kheifets;Kol'tsov;Khachaturov;Gindin[RussianJournalofOrganicChemistry,2000,vol.36,#9,p.1373-1387]
[1]Bogodist,Yu.I.;Protsenko,D.L.[Sovietprogressinchemistry,1970,vol.36,#11,p.50-52][UkrainskiiKhimicheskiiZhurnal(RussianEdition),1970,vol.36,#11,p.1142-1145]